1)The male brain is 10% bigger than the female’s but the female brain works more efficiently.
2)It takes twice as long to lose new muscle if you stop working out than it did to gain it.
3)The cerebral cortex is about 85% of the brain.
4)Your eyebrows stay short because their growing cycle is short.
5)Your upper arm bone is called the humerus, otherwise known as the “funny bone.”
6)Adult lungs have a surface area of around 70 square meters.
7)About 70% of your immune system is in your digestive system.
8)The kidney is the most transplanted organ. About 70,000 kidney transplants are performed each year worldwide.
9)If an identical twin grows up without having a certain tooth, the other twin will most likely also grow up with that tooth missing.
10)The lifespan of a human hair is 3-7 years.
11)The liver affects nearly every physiological process of the body and performs over 500 different chemical functions.
12)It is important to sleep for at least 8 hours per night, as under 5 hours of sleep can significantly depress your immune functions.
13)Fingernails do not have any sensory feeling.
14)Your feet have about half a million sweat glands and can produce more than a pint of sweat per day.
15)Your body uses 300 muscles to balance itself when you are standing still.
16)At birth, the human brain weighs an average of about 0.8 lbs. An adult’s brain weighs about 3 lbs.
17)A newborn baby’s brain grows almost 3 times in the first year.
18)Your spinal cord is the route for all nerve signals traveling between your brain and your body.
19)The liver aids in digestion and detoxification of food impurities and inspects nutrients before allowing them into the bloodstream.
20)The strong contraction of your heart creates enough pressure to squirt blood up to 30 feet.
21)Infants blink only once or twice a minute while adults average around 10.
22)The human thumb is controlled by 9 individual muscles, which are controlled by 3 major hand nerves.
23)The face contains more than 50 muscles, which give us our large range of facial expressions.
24)Your cerebral cortex is about as thick as a tongue depressor. It grows thicker as you learn and use it.
25)Your spleen’s main function is to act as a filter for your blood.
26)The average human scalp has 100,000 hairs.
27)Throughout every day and night of our lives we smell a wide variety of odors without being aware of them at all.
28)Each human hand contains 48 nerves: 3 major nerves, 24 sensory branches, and 21 muscular branches.
29)Our hair turns gray as we age because the pigment cells in the hair follicle, which is responsible for producing melanin, start to die.
30)Your skin contains a protein called keratin which is also found in hair and nails.
31)Although earlobes don’t serve a specific biological function they have many nerve endings, which for some people makes it a “pleasure spot”.
32)An unusually low sperm count is known as oligospermia, and the absence of any sperm from the semen is termed azoospermia.
33)If all your muscles could pull in one direction you could create a force of 25 tons.
34)The brain’s gray matter is made up of neurons, which gather and transmit signals.
35)British research found that one smile can generate the same level of brain stimulation as eat up to 2,000 bars of chocolate.
36)Women have approximately 4.5 liters of blood in their body, while men have about 5.6 liters.
37)On average, babies double their birth weight by 4 months and triple it after one year.
38)The most important potential energy storage molecule in the body is ATP.
39)There are an estimated 20,000 to 25,000 genes in our genome.
40)An enlarged prostate gland can cause both erectile dysfunction and premature ejaculation.
41)Less than 30% of adults and children who need a bone marrow transplant find a suitable match among their own family members.
42)Teeth are kept alive by blood and nerves.
43)A single muscle cell of the sartorius muscle in the thigh can be more than 12 inches long.
44)No two people smell the same odor the same way. In other words, a rose may smell sweeter to some people than to others.
45)Your tongue is the body part that heals the quickest.
46)Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.
47)If your brain loses blood for 8-10 seconds, you will lose consciousness.
48)The cerebellum contains half of all the neurons in the brain but comprises only 10% of the brain.
49)The average life span of a single red blood cell is 120 days.
50)The big toe is the foot reflexology pressure point for the head.
51)Your larynx is a cartilaginous structure at the top of your trachea which contains elastic vocal cords.
52)Beards are the fastest growing hairs on the human body.
53)The ammonia in urine is actually one of the most antique methods of teeth whitening.
54)Half of your body’s red blood cells are replaced every 7 days.
55)The skin is constantly renewing itself from the bottom up and takes 52–77 days to shed cells.
56)People with wet earwax have more unpleasant armpit odor compared to those with dry earwax.
57)The energy used by the brain is enough to light a 25-Watt bulb.
58)The Achilles tendon, the largest tendon in your body, can withstand more than 1,000 pounds of force.
59)Babies’ hearts beat at twice the rate of adults’, and they breathe twice as fast as adults.
60)When resting, the average adult breathes around 12 to 20 times a minute.
61)The fastest growing nail is on your middle finger.
62)Everyday, an average person loses about 100 strands of hair.
63)If all the blood vessels in your body were laid end to end, they would reach about 60,000 miles.
64)People whose mouth has a narrow roof are more likely to snore This is because they have less oxygen going through their nose.
65)In 1 hour you shed 600,000 particles of skin Over the course of a year, all of those particles pile up to 1.5lbs, the same weight as an iPad
66)An average man has about 10 erections during sleep.
67)Each of your bones contains about 20% water, which means your whole skeleton contains more than two liters of water.
68)Over 99% of your DNA sequence is the same as other people’s.
69)Your eyes begin to develop 2 weeks after conception.
70)The human face is made up of 14 bones.
71)There are about 100 billion neurons in the human brain, the same number of stars in our galaxy.
72)80% of the world’s population will suffer from back pain due to a problem starting in their feet.
73)The average human being has 21 square feet of skin and about 300 million skin cells.
74)Human milk contains antibodies that can coat the newborn baby’s intestines and respiratory tract and fight off infection.
75)Almost all the cells in your body have DNA, with the exception of red blood cells.
76)Cartilage makes up 25% of your spine’s length.
77)The hyoid bone, in your throat, is the only bone in your body that is not attached to other bones.
78)In human kidney and brain, as much as 2/3 of energy consumed at rest is to pump Na+ and K+ across plasma membrane.
79)Each human hand contains 29 bones, 29 joints, 123 ligaments, and 34 muscles.
80)It takes your mouth, esophagus, stomach, small intestine, large intestine, gallbladder, pancreas and liver just to digest a glass of milk.
81)A fetus can have hiccups. They actually help strengthen the diaphragm and prepare the fetus for breathing.
82)About 1 person in 20 has two extra ribs, making 13 pairs instead of 12.
83)By 8 weeks, when the embryo is only an inch long, the heart is fully developed.
84)From the age of thirty, humans gradually begin to shrink in size.
84)During early pregnancy, the rate of neuron growth is about 250,000 neurons a minute.
85)Your eyes are always the same size from birth, but your nose and ears never stop growing.
86)A baby can digest up to 98% of the fat in mother’s milk.
87)In a life time, your digestive system can handle about 50 tons of food and liquid.
88)The female egg is the largest cell in the human body.
89)The lung on the left side of your body is divided into two lobes while the lung on your right side is divided into three.
90)Females are better at discriminating among colors, while males excel at tracking fast-moving objects and discerning detail from a distance.
91)A cough releases an explosive charge of air that moves at speeds up to 60 mph.
92)Tears, saliva and blood contain lysozyme, an enzyme that kills some bacteria by destroying their cell walls.
93)On average, women tend to have longer index fingers and men tend to have longer ring fingers
94)Calcium is the most abundant mineral in your body.
95)Your sense of smell is 10,000 times more sensitive than your sense of taste.
96)Each of your lungs has about 300-400 million alveoli, the small air sacs where oxygen and carbon dioxide get exchanged.
97)Your shoulder is 1 of the most flexible but least stable joints of your skeleton because it is set in a very shallow socket.
98)Adults can hold about 1.5 liters of food in their stomach.
99)The biggest muscle is the gluteus maximus in the buttock; the smallest muscle is the stapedius deep in the ear.
100)A yellow coating on your tongue means that you may have a stomach problem.
101)Men have one extra gene, which is responsible for aggression when stressed
102)Our hair turns gray as we age because the pigment cells in the hair follicle, which is responsible for producing melanin, start to die.
103)Your spinal cord can work independently of your brain, sending out responses to your muscles directly.